mance名词词性的后缀，如performance
例句
1、
The performance of the engine was tested at different settings.
对引擎的性能在不同的挡上做了试验。
2、
The findings are arranged in rank order according to performance.
这些研究结果是根据性能等级排列的。
3、
The company needs to improve performance in all these areas.
公司需要在所有这些方面改善业绩。